Problem
The appliance is down, The reason is the disk is full on the appliance.
Reproduction/Solution
From the appliance, Run the df command to to initially check space on appliance disk looking for usage at or close to 100%
# This check the file system usage (-h just means use 1024 as the divisor for space i.e. 1K = 2024 bytes, 1Mb = 1024K etc.). df -h
Usage of 100% is blocking appliance stack starting
# Check if the stack can start sudo /opt/docker/start-appliance-stack.sh
The appliance stack cannot start.
To establish the largest directories to identify the are where all disk is consumed, run the following:
# This check the /opt directory. sudo du -a /opt/ 2>/dev/null | sort -n -r | head -n 20
This main cause seems to be at a root level so identify the main targets of use
# Check disk usage command (du) at the root level du -a / | sort -n -r | head -n 5
remember to check other locations as well
Clearing the Syslog will resolve the issue.
# Force removal of all teh syslog files and any subfolders. Note: use rm command with care. sudo rm -rf /var/log/syslog* # reboot appliance sudo shutdown -r now